Convert RGB image to YUV and YCbCr color space image in Opencv Python

Question

谁能帮助我使用opencv Python将RGB颜色空间图像转换为YUV颜色空间图像和YCbCr颜色空间图像？

Answer 1

Use cv2.cvtColor(src, code) to convert Color-Space, the code starts with COLOR_ .

You can use this to look for the color code.

import cv2
## get all color codes
codes = [x for x in dir(cv2) if x.startswith("COLOR_")]

## print first three color codes
print(codes[:3])
# ['COLOR_BAYER_BG2BGR', 'COLOR_BAYER_BG2BGRA', 'COLOR_BAYER_BG2BGR_EA']

## print all color codes
print(codes)

If you read the image into BGR space, then use cv2.COLOR_BGR2YUV and cv2.COLOR_BGR2YCrCb :

#cv2.COLOR_BGR2YUV
#cv2.COLOR_BGR2YCrCb

img = cv2.imread("test.png")
yuv = cv2.cvtColor(img, cv2.COLOR_BGR2YUV)
cv2.imwrite("yuv.png", yuv)

If you read the image into RGB space, then use cv2.COLOR_RGB2YUV and cv2.COLOR_RGB2YCrCb .

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Here is an example image(in BGR-HSV-YUV-YCRCB color spaces):